House Trained Dog Pooping Inside?

I have got a lovely natured GSD. She has never been any problem with peeing and pooing in the house. I took her in as a rescue dog at 8 months and she is now nearly 7 years old. She was restless tonight telling me she wanted to go out all the time by going to the front door. So I got up a number of times to let her out, but it was raining outside and she would go out, but come back in within seconds.

After 7 times letting her out I came back into the living room and she went out to the kitchen and emptied her bowels after having 7 chances to go out. I don't know if it was because it was raining, but I have not had this problem with her before. Can anybody help? Why she would do this is very strange for her unless she could hear thunder in the air that I could not hear as their hearing is a lot more powerful than ours.